Andrew Rockwell

This plugin automatically makes all the tables on your site responsive.
Live Example: 
http://plugins.rockwellgrowth.com/automatic-responsive-tables/
NEW!
<ul>
<li>exclude option</li>
<li>applies to dynamically loaded tables now</li>
</ul>
Features:
<ul>
<li>Fixed bug with links in the table</li>
<li>Fixed bug for tables with no table headers</li>
<li>Specify only certain tables you’d like this plugin to affect.</li>
<li>Specify the breakpoint for responsiveness</li>
<li>Optional styling</li>
<li>Compatible across all major browsers</li>
<li>Backend style editor w/ preview panel</li>
<li>Supports IE5+ !!!</li>
</ul>

Automatic Responsive Tables

Just tested this with a Donation Confirmation Receipt from our Give plugin and it works perfectly without having to configure anything. 
I don't know what it would do with really complex tables, but for the basics this does the job.
Nice work!



Works right out of the box

Leave your tables as they are. Add this plugin, and they're all responsive.

Processby

Storky87

This plugin makes HTML tables horizontally scrollable on a small screen. This makes it horizontally scrollable in its own container, which is fits the screen.
<h4>Features</h4>
<ul>
<li>Works out of the box, additional settings is not required;</li>
<li>This plugin does not use shortcodes. It works with regular HTML table in Classic Editor, or in Gutenberg;</li>
<li>Customisable tables styles;</li>
<li>Table column sort – <a href="https://processby.com/responsive-tables-wordpress/#wprt-demo" rel="nofollow ugc">demo</a>;</li>
<li>Not increasing table height;</li>
<li>Totally Free.</li>
</ul>

WP Responsive Table

Makes HTML tables horizontally scrollable on a small screen and customizes tables styles.

Automatic Responsive Tables vs WP Responsive Table